[Stooky Bill]

I believe there was a potential for 9.25 splats as GMTV finished as the distribution was reconfigured at the London end to take the extra facilities for macro regional ads out of circuit.

It wasn't the macro regions being taken out of circuit, it was the ITV companies presentation suites being taken out/put back into line. 

GMTV still passed through the regional centres as they did the news bulletins, but my understanding but via the news studios who essentially opted out. 

Presumably the circuits carrying GMTV to the regions was then replaced with the first network programme. The macro ad regions were irrelevant, each station would have just got one